-ey c-- ccc cce ccm ccs cct ce- cec cee cem ces cet cey cmc cme cmm cms cmt cmy csc cse csm css cst csy ctc cte ctm cts ctt cty cyc cye cym cys cyt ec- ecc ece ecm ecs ect eec eee eem ees eet eey em- emc eme emm ems emt es- esc ese esm ess est esy etc ete etm ets ett ety eyc eye eym eys eyt mc- mcc mce mcm mcs mct mec mee mem mes met mey mmc mme mmm mms mmt msc mse msm mss mst msy mtc mte mtm mts mtt my- myc mye mym mys myt scc sce scm scs sct se- sec see sem ses set sey smc sme smm sms smt smy ss- ssc sse ssm sss sst stc ste stm sts stt sty sy- syc sye sym sys syt tcc tce tcm tcs tct te- tec tee tem tes tet tey tmc tme tmm tms tmt tmy tsc tse tsm tss tst tsy ttc tte ttm tts ttt tty tyc tye tym tys tyt ycc yce ycs ycy yec yee yem yes yet yey ymc yme ymm yms ymt ysc yse ysm yss yst ysy ytc yte ytm yts ytt yyc yye yys yyt yyy